[Kde-java] Problems with KDE Java on MacOS X

[George Russell]

AFAIK, the bindings simply do not work on OSX, regardless of whether or 
not compiled from gcj or javac.

Just as in Linux, they compile and install to the shared library and jar 
files in the KDE install prefix.

Unlike in Linux, the JVM does not pick up the presence of the libraries 
indicated by the LD_LIBRARY_PATH or the DYLD_LIBRARY_PATH

It always throws an error, as below

Exception in thread "main" java.lang.UnsatisfiedLinkError: no qtjava in 
java.library.path
         at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1403)
         at java.lang.Runtime.loadLibrary0(Runtime.java:788)
         at java.lang.System.loadLibrary(System.java:832)
         at org.kde.qt.qtjava.initialize(qtjava.java:272)
         at org.kde.qt.qtjava.<clinit>(qtjava.java:283)
         at Main.<clinit>(Main.java:36)

The JVM for OSX needs specially named JNI libraries. This seems to be 
only a .jnilib extension, as it works when I symlink libqtjava.dylib to 
libqtjava.jnilib

Apple have an example of how to build JNI libraries for OSX
http://developer.apple.com/samplecode/Sample_Code/Java/JNISample.htm
There are details of how OSX differs included in the JNI guide below.
http://www.mindspring.com/~david.dagon/jni/Native.txt

George